Improvement in ventilators for sewers



ing Vfrom sewers.

UNITED STATES PATENT Orrieisi.

WILLIAM EcHAsE, oF WASHINGTON, DISTRICT or COLUMBIA.

I MPRovi-:MENr-IN VENTILATQRS FoR-s'EwERs.

specification forming part of Letters Patent Nb. 154,645, dated september 1, 1874; application filed August 18, 1874. l

To all whom itmay concern: v

that I, WLILIAM H. CHASE,

' ment in Sewer-ventilators; and I do hereby i declare that the following is a specification thereof'.

Manykinds of apparatus have been suggeSted for purifying theV noxious gases escap In the best of these the gases are coal.

be kept comparatively dry, as, when saturated withwater it ceases to be elicacious.

It -is essential, also, that the gases be not `required to iiow through masses of charcoal, for thereby the resistancel to their escape will be such that, failing to find exit through the/ventilators, they will be forced U 'to esca-pe through the connections leading ontot'honscs, filling them with their noxious -exhalations.`

1t has been proposed to build the ventilators with caps, toexclude the water, and also with diverse forms of receivers, to hold the water which would enter. through the side orifices provided for the escape of the gases, when, as has been the case, the ventilators were placed in the roadway, where They have they are liable to be Hooded.

been constructed with many kinds of rcccptacles for the charcoal; among others, with those whose pansare disposed on each slde of the ventilator-tube alternately, such pans containing athin layer of charcoal, and having about half the area of thetube open, so that no back pressure can be obtained in the sewer.

This construction has `been highly esv teemed, but it is subject to one serious obtion: That spaces were left between thcedgcs ot' the tion' is intended 5l and, 'to this end, my inven" tion consists in packing theV joint where the pan rests on the ventilator, so that no gas may escape between the pipe and the pan purified by contact with char-4 It is essential that the charcoal should except through purpose. 1

'In the annexed drawings, Figure l is a' vertical section of the ventilator complete. Fig. 2 is a perspectiveview, showing the construction and arrangement of the pans.

` The same letters are employed in bot-h figures to indicate identical parts. `A is a branch pipe leading to the sewer, and extending fronrit so far that the ventilator-pil'ie B may be carried up through the sidewalk, and located as .hydrants are. By this locationl exclude the dirt and water from the ventilator ;4 whereas `those placed in the roadway must be-sunken, and then are liable to be ilooded. The ventilator, instead of being a cylindrical tube ofy uniform diameter, I prefer to make ofa series of sections of constantly-in creasing diameter; and, on the upper end of each' section, which forms a ledge, I form an annular recess, to receive line dry sand, water, or other `equivalent material capable ot' preventing the passage ofthe ascending' gases. This recess is shown at b. Y

The charcoal-pans D .are formed, as shown in Fig. 2, of frames, each a little more than a' semicircle,and attached to a rod, E, by which they may be lifted in and out whenfthe eharcoal requires to be replenished or replaced by fresh coal.' a little above thelower edge ot' the ring, so as toleave a downwardly-projecting edge to set into the dry-sand packing in the recess b.

The cap C covers the tube B, projecting so as to exclude the rain-from the opening C' in the top ofthe tube, which should be raised above the flagging of the sidewalk far enough to prevent the wash-water from entering. j 'By being thus enabled to keep the charcoal dry, it has .been estimated by writers on' the subject that it would only be necessaryr to renew the charcoal yearly instead of monthly, as-is necessary in ventilators where the charcoal is exposed to the wash from the streets.

Vhat l claim as my invention, and desire to secure by Letters Patent, is

1. In combination with the ventilator-.pipe and pans forcharcoal, recesses filled with a packing material4 to receive the edge of the lpan,

the-open spaces left for the i The bottom' of each pan is placed l `and prevent the escape of the ascending gases through the space between the side of the pan and the surface of the pipe, substantially as l set forth.

tending from the Ventilator to the sewer,

whereby I am enabled to locate the Ventilator on the sidewalk instead of in the roadway,

V2l f 4154,645

and thus protect the charcoal used tolidisinfecting the gases against dirt and saturation by wash-Water, substantially as set forth..

In testimony whereof I have signed myname to this' specification in the presence of two subscribing witnesses.

WM. H. CHASE.

Witnesses:

DLP. HOLLOWAY, H. E. QUEEN. 

